Envelope



March 10, 1942. M. KAHN I 2,275,767

ENVELOPE Filed Aug. 11', 1938 INVENTOR M75072 Karl Z72, BY

- ATRN iatented Mar. 10, 1942' UNlTED STATES PATENT OFFICE ENVELOPEMilton Kahn, Iiong Island City, N. Y., assignor to Novelart Mfg. (30.,New York, N. Y.,'a firm App ication August 11, 1938, Serial No. 224,311

3 Claims.

This invention relates to envelopes of the type wherein sealing of theenvelope is performed without requiring. moistenin'g of theadhesivesubstance, and its principal object is to provide ing flap is folded inthe packing of the) en-- velopes. c h

A still further object is to provide an envelope, which, while embodyingthe aforesaid-advantages, will possess an outward appearance resemblingthat of the normal letter envelope.

Other objects and advantages will hereinafter appear.

In the accompanying drawing,

Fig. l'is a plan view showing the blank or integral'sheet from which theletter envelope of the invention is made.

closing flap is provided with a corresponding area carrying similar dryadhesive coating I0,

while the ends of side flaps 4 have usual glued areas ll.

In the making of theenvelope, the tab 1 is folded against theundersurface of the rear wall 3, along score-line I2 that concides withthe terminal edge 6, while its'coating 9 is adhered tothe coated .areal3 of said wall, and thereafter the envelope is folded up and completedin the usual manner along score lines I4, the side flaps 4 being foldedagainst the inner surface of front wall 2 and the rear wall 3beingadhered to the gluedportions ll of said flaps, in the manner illustratedin Fig. 2. .As thus completed, the top v or terminal edge 6 of the rearwall 3' is in a greatly strengthened condition,.due to thefoldingthereabout of the tab 1 against the 'under- 1 5: surface of said wall,while the area ofthe latter between said edge and its slot 8 isparticularly reinforced owing to the adherence to its undersurface ofthe tab 1; which is thus in turn freely suspended below the slot 8 andlies between the walls 2, 3. As in a usual letter envelope, the coating)of flap 5 normally appears concealed,

Fig.2 is a rear view elevation of the envelope of this invention, as itappears when in normal state, or prior to utilization and sealing.

Fig. 3 is a transverse-sectional end elevation of the envelope shown'in'Fig. 2.

Fig. 4 is a view similar to Fig. 2, but showing the envelope as itappearswhen in completely sealed state.

Fig. 5 is a transverse-sectional end elevation of the envelope, taken onthe line 5-5 of Fig. 4.

As illustrated in Fig. 1, the letter envelope is made of a singleintegral blank sheet I, comprising a usual addressing front wall 2, arear wall 3, side flaps 4, a sealing flap 5, and from the terminal edge6 of rear wall 3 projects a tab I as shown. The rear wall 3 is providedwith a slot 8 which is parallel to its edge 6. Upon the area of tab Iand the rear wall 3 between said tab and the slot 8 is provided acoating 9 of dry adhesive substance of a type which, whether moistenedor unmoistened, will not stick or adhere to uncoated areas of paper, butwill firmly stick to the same adhesive substance forming a coating ofanother portion of paper. Any suitable substance forming the coating 9may be resorted to, such as a solution of para rubber in gasoline, orany other known material which will carry out a similar function. The

as is also, theentire tab with its coating 9.

.When it is desiredto utilize and seal the envelope,.-the leadingportion of the sealingiiap' 5 is passed through the slot 8 to a positionunderneath the rear wall 3, and between said wall and the tab 1, so thatits coating III is in registry with the coating 9 of the latter, asclearly illustratedin Figs. 4, 5, the former figure being presented ashaving paper portions torn awayfor clarifying purposes. Upon thenapplying pressure against the rear wall 3 and upon the flap 5 the latteradheres firmly to the tab 1,

through the action of the dry adhering coat- 'ings 9, l0, whereby anefficient sealing of the envelope is efiected. It will be noted that byvirtue of the foregoing provisions of this envelope, not. only willthere be no danger of its sticking to any other paper or other envelopematerial in the packing of the envelopes, but its adhesive coatings 9,III will be both normally concealed, to obviate exposure, disintegrationof the coatings, catching of dust, dirt, or other matter, or producingother injury to the dry adhering coatings. While the letter envelope ofthis invention is provided withlefficient sealing means therefor, itsappearance nevertheless resembles that of a regular or conventionalletter envelope, which advantage is of utmost importance to this type ofarticle.

Having thus described my invention, I claim:

1. A dry adhering envelope having the combination of a front wall, arear'wall, a closing flap forming part of said front wall folding oversaid rear wall, said rear wall having a slot, said rear wall having atab integral therewith and projecting therefrom beyond its topmostconfine, said tab being folded to lie against the undersurface of saidrear wall and having a dry adhering coat facing said undersurface, theundersurface of said flap having a dry adhering coat, and said flapbeing adapted to pass its leading portion through said slot to bring itscoat into registry with the coat of said tab.

2. A dry adhering envelope having the combination of a front wall, arear wall, aclosing flap forming part of said front wall folding oversaid rear wall, said rear wall having a slot, said rear wall having atab integral therewith and projecting therefrom beyond its topmostconfine, said tab being folded to lie against the undersurface of saidrear wall and having a dry adhering coat facing said undersurface, saidrear wall and said tab having portions of their surfaces in adherencewith each other, the undersurface of said flap having a dry adheringcoat,

and said flap being adapted to pass its leading portion through saidslot to bring its coat into registry with the coat of said ta 3. A dryadhering envelope having the combination of a front wall, a rear-wall, aclosing flap forming part of said front wall folding over said rearwall, said rear wall having a slot, said rear wall having a tab integraltherewith and proiecting therefrom beyond its topmost confine, said tabbeing folded to lie against the undersurface of said rear wall andhaving a dry ad- 'hering coat facing said undersurface, said rear walland said tab havingportions of their surfaces in adherence with eachother by dry adhering coatings, the undersurface of said flap having adry adhering coat, and said flap being adapted to pass its leadingportion through said slot to bring its coatinto registry with the coatof said tab.

MILTON KAHN.

